"This 1942 manual is published for the information and guidance of personnel using the 20mm aircraft gun materiel M1 and M2 and contains technical information requried in the identification, use, and care of the materiel."

"This 1954 manual is a guide to assist commanders in developing the sections of 8 inch gun M1 and 240-mm howitzer M1 firing batteries into efficient, smooth-working teams that have a sense of discipline that will impel them to operate effectively...